Perhaps you should try some spelling variations:
"duong sinh cau snippets" » "duong minh cau snippets", "duong manh cau snippets", "trong sinh cau snippets", "duong trinh cau snippets", "duong sinh vat snippets", "duong sinh va snippets"
"hang java java snippets" » "hang va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duong sinh cau snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong sinh cau snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong sinh cau snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong sinh cau snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.